On 2014-07-11 11:07:21 -0400, Tom Lane wrote: > David G Johnston <david.g.johns...@gmail.com> writes: > > Benedikt Grundmann wrote > >> That is it possible to tell the planner that index is off limits i.e. > >> don't ever generate a plan using it? > > > Catalog hacking could work but not recommended (nor do I know the proper > > commands and limitations). Do you need the database/table to accept writes > > during the testing period? > > Hacking pg_index.indisvalid could work, given a reasonably recent PG. > I would not try it in production until I'd tested it ;-)
Works, but IIRC can cause problems at least < 9.4 because concurrent cache builds might miss the pg_index row... Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
